An off the wall question about the zoo

I heard on the news that the St.Louis zoo had to put down there oldest elephant yesterday that had been there since 1955 due to arthritis.

My question for anyone familiar with the zoo is, What the hell do they do with a huge full grown elephant after they kill it??? If it were me I would use the thousands of pounds of meat to feed the Lions and tigers and bears (Oh my). but something tells me that this is probably not what they do with it.